I thought his explanation of the vote on TPP was wuite clear. What the vote was about was to set the ground rules for when the treaty comes to the senate after negotiations have been completed, and the entire agreement is submitted. What Cruz was supporting was the same setup other recent presidenta have had with multilateral trade agreements. Basically, that once presented to congress, that the bill would be submitted for a straight up or down vote without amendments. This is because if you add any amendments to the bill you would essentially be throwing it out because those changes would then have to be renegotiated with all parties to it.
I actually agree with this position pretty much completely, because it makes sense with this type of treaty.
What I absolutely disagreed with was the entire concept of calling this treaty an “agreement” rather than what it is, in order to subvert the constitutional requirement of 2/3 approval for treaties.
The first part is necessary, whereas the second part is not.